More than 100 years ago, in 1892, German bacteriologist Richard Pfeiffer isolated from patient nasal secretions a bacillus he thought was the causative agent of influenza, which he called Bacillus influenza. Subsequently, “Pfeiffer’s bacillus” was considered the cause of the 1918 Spanish flu until, in 1933, following outbreaks in pigs in Iowa two years earlier, … Continue reading Haemophilus — “blood-loving”